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Biomass residue cellulose-based poly(ionic liquid)s: new materials with selective metal ion adsorption
Biomass Conversion and Biorefinery ( IF 4 ) Pub Date : 2020-07-14 , DOI: 10.1007/s13399-020-00889-6
Lu Xu , Aili Wang , Siqiang Li , Liya Zhang , Ruiyu Pan , Peng Guo , Ming Yi , Jie Liu

Biomass residue cellulose-based poly-(ionic liquid)s (ILs) were in situ synthesized via activators generated by electron transfer for atom transfer radical polymerization in ionic liquid microemulsions. These biomass residues, including apple residue, citrus residue, and ginkgo leaf, were started with pretreatment and modification in ionic liquid microemulsions, and their structure and thermal stability were significantly altered before and after modification as confirmed by scanning electron microscopy and thermogravimetric analysis. Fourier-transform infrared spectroscopy and 31P nuclear magnetic resonance spectroscopy were used to investigate the molecular structure of the biomass residue cellulose-based poly-ILs. In addition, the adsorption performance of the biomass residue cellulose-based poly-IL adsorbents for heavy metal ions, such as Cd(II), Zn(II), Cr(IV), Cu(II), Mn(II), Ni(II), and Pb(II), in water were investigated. Results show that the prepared adsorbent possesses good thermal stability and certain adsorption capacity for metal ions in water, especially for nickel ions (93.91 mg/g). The prepared adsorbent also exhibits remarkable performance in the field of biomass residue utilization and novel poly-IL adsorbents.



中文翻译:

生物质残余物纤维素基聚离子液体:具有选择性金属离子吸附的新材料

通过电子转移产生的活化剂原位合成生物质残留纤维素基聚(离子液体)(ILs),用于离子液体微乳中的原子转移自由基聚合。这些生物质残留物,包括苹果残留物,柑橘残留物和银杏叶,是通过离子液体微乳的预处理和修饰开始的,修饰前后,其结构和热稳定性均发生了明显变化,这已通过扫描电子显微镜和热重分析证实。傅里叶变换红外光谱和31P核磁共振波谱用于研究生物质残余物纤维素基聚IL的分子结构。此外,生物质残余物纤维素基聚IL吸附剂对Cd(II),Zn(II),Cr(IV),Cu(II),Mn(II),Ni等重金属离子的吸附性能(II)和Pb(II)在水中进行了研究。结果表明,所制备的吸附剂具有良好的热稳定性,对水中的金属离子具有一定的吸附能力,尤其对于镍离子为93.91 mg / g。制备的吸附剂在生物质残渣利用和新型聚-IL吸附剂领域中也表现出卓越的性能。

更新日期:2020-07-14
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